Cheap flights from Ontario to San Jose from $49
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Jose departing on 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Ontario to San Jose
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to San Jose?
In general, July is the cheapest month to fly from Ontario to San Jose. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $136. If you aren’t able to travel to San Jose during the month of July, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $164.
What is the cheapest day to depart on your flight to San Jose?
The cheapest day to depart on your flight to San Jose is on a Thursday when prices can be found for as low as $121. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Jose on Sunday is $162.
What is the cheapest time of day to depart on your flight to San Jose?
Our most recent data shows that the best time of day to fly to San Jose is in the evening. Flights from Ontario to San Jose during this time can be as low as $88. In contrast, the most expensive time of day to depart to San Jose is in the morning when prices are around $146.
What is the cheapest Ontario to San Jose flight route?
Fly from Ontario to San Jose for the best Ontario - San Jose flight prices
How far in advance should I book a flight to San Jose?
You are more likely to see cheaper flights to San Jose from Ontario when booking 21 weeks ahead of your departure date. In general, you can expect to find flights to San Jose for around $221 when searching 21 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Jose from Ontario for as low as $123 on momondo.
What cabin class options are available on Ontario to San Jose flights?
There are 1 cabin classes available to choose from on Ontario to San Jose flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to San Jose?
Southwest, Frontier, and Hawaiian Airlines are the most popular carriers operating from Ontario to San Jose
What airlines fly to San Jose?
Frontier, United Airlines and Spirit Airlines are the top three most popular airlines that fly to San Jose from Ontario according to our data. Frontier is the first choice among our users, with 39% of people opting to fly with this airline when traveling to San Jose. Keep in mind that there are 10 different airlines that fly to San Jose on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to San Jose on average per day?
The number of flights available between Ontario and San Jose is 3 per day as of June 2025. The most frequent departure time is 6:00AM, with 42% of daily flights leaving in the afternoon.
How many flights depart from Ontario to San Jose on average per week?
As of June 2025, 21 flights take off from Ontario and land in San Jose each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.
When to book flights from Ontario to San Jose
Cheap Ontario to San Jose (ONT to SJC) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to San Jose
How far is Ontario to San Jose by plane?
There are 327.8 mi between Ontario and San Jose. Typically, this will take 1h 10m by plane in normal conditions.
When did momondo last update prices for flights from Ontario Airport to San Jose Airport?
Prices for flights from Ontario Airport to San Jose Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to San Jose Airport?
The number of operators available for flights from Ontario Airport to San Jose Airport is 5 as of June 2025.
How old do you have to be to fly from Ontario Airport to San Jose Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to San Jose Airport.
What documentation or ID do you need to fly to San Jose Airport?
The necessary travel and health documents for your San Jose Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ontario to San Jose?
Based on momondo bookings for flights between Ontario and San Jose, the leading plane model is Boeing 737 MAX 8, making up 19.77% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 17.84%, Boeing 737-800 Passenger/BBJ2 (winglets) with 14.77%, and Airbus A320neo with 9.77%.
What is the most popular airline from Ontario to San Jose?
Based on momondo bookings for flights between Ontario and San Jose, the leading airline is Southwest, making up 73% of the total bookings. Other popular airlines include Frontier with 17%, Spirit Airlines with 7%, and United Airlines with 2%.
Best airlines flying from Ontario to San Jose
Compare and see reviews for airlines that fly from Ontario to San Jose with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $30 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $40 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $113 | Free Cancellation | Rating 8.0 4,287 reviews | |||
| PriceFrom $117 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 8.0 10,000 reviews |
Southwest Flights From Ontario to San Jose
The lowest priced Southwest flight from Ontario to San Jose from the last 72 hours was $113. Generally, Southwest has 21 flights on this route every week with an average price of $259. Southwest is rated 8.0/10 by our users.
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to San Jose?
It is quick and easy to find Ontario to San Jose flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Jose that suits you.
Can I find flights from Ontario to San Jose with flexible booking policies on momondo?
Flights from Ontario to San Jose with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Ontario to San Jose?
Once you have performed a search for Ontario to San Jose flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Ontario to San Jose right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Ontario to San Jose flights. All you need is a valid email address and we will do the rest; it is that quick and easy.